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1. $x^{2} - 3 x + 1 = 0$

Answer: Option A

Explanation:

দেওয়া আছে, x^{2} -3x+1=0 \Rightarrow x^{2} + 1 = 3 x \Rightarrow \frac{x^{2} + 1}{x} = 3 \Rightarrow \frac{x^{2}}{x} + \frac{1}{x} = 3 ∴ x + \frac{1}{x} = 3

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